Vitamins are biomolecules required for proper organism functioning.

 

RDA - recommended dietary allowance.

Established by the Food and Nutrition Board of the US Institute of Medicine, the RDA is the average daily dietary intake level of a nutrient sufficient to meet the requirements of nearly all healthy individuals in a specific life stage and gender group.

AI - adequate intake.

Established by the Food and Nutrition Board of the US Institute of Medicine, the AI is a recommended intake value based on observed or experimentally determined estimates of nutrient intake by a group of healthy people that are assumed to be adequate.

An adequate intake is established when a recommended dietary allowance cannot be determined.

UL - tolerable upper intake level.

Established by the Food and Nutrition Board of the US Institute of Medicine, the UL is the highest level of daily intake of a specific nutrient likely to pose no risk of adverse health effects in almost all individuals of a specified age.

References